Display device and driving method thereof

1 . A display device, having different working modes for executing different overcurrent protection operation processes comprising a first working mode applicable to a test of an electrostatic discharge capability of the display device, and comprising:

a display panel comprising a signal line; and

a driving circuit board electrically connected to the display panel,

wherein in the first working mode, the driving circuit board is configured to perform an overcurrent protection on the display panel when a current in the signal line is greater than a preset current during at least two consecutive frames; wherein

the driving circuit board is configured to determine whether the current in the signal line is greater than the preset current in one frame by determining whether an absolute value of the current in the signal line is greater than the preset current in two periods spaced apart within the frame; and/or

the driving circuit board is configured to determine whether the current in the signal line is greater than the preset current in one frame by determining whether a case that the absolute value of the current of the signal line is greater than the preset current in the frame persists for at least a preset duration.

2 . The display device according to claim 1 , further having a second working mode,

wherein in the second working mode, the driving circuit board is configured to perform the overcurrent protection on the display panel when the current in the signal line is greater than the preset current during one frame.

3 . The display device according to claim 2 , wherein the driving circuit board comprises a register, the driving circuit board is configured to perform the overcurrent protection on the display panel according to information stored in the register and the current in the signal line;

in the second working mode, the information stored in the register comprises a first information, and the driving circuit board is configured to perform the overcurrent protection on the display panel when the current in the signal line is greater than the preset current during one frame; and

in the first working mode, the information stored in the register comprises a second information, and the driving circuit board is configured to perform the overcurrent protection on the display panel when the current in the signal line is greater than the preset current during at least two consecutive frames.

4 . The display device according to claim 3 , wherein when the information stored in the register comprises the second information, the driving circuit board is configured to perform the overcurrent protection on the display panel when the current in the signal line is greater than the preset current during two consecutive frames.

5 . The display device according to claim 3 , wherein the second information is at least a first sub-information or a second sub-information;

when the information stored in the register comprises the first sub-information, the driving circuit board is configured to perform the overcurrent protection on the display panel when the current in the signal line is greater than the preset current during two consecutive frames; and

when the information stored in the register comprises the second sub-information, the driving circuit board is configured to perform the overcurrent protection on the display panel when the current in the signal line is greater than the preset current during at least three consecutive frames.

6 . The display device according to claim 1 , wherein the signal line comprises clock signal lines, the driving circuit board is at least configured to perform the overcurrent protection on the display panel when a current on at least one of the clock signal lines is greater than the preset current during at least two consecutive frames; and

wherein the display panel comprises:

a plurality of subpixels;

a plurality of gate lines;

a gate driving circuit electrically connected to the plurality of gate lines and configured to transmit corresponding gate signals to corresponding ones of the subpixels through the gate lines; and

a plurality of the clock signal lines electrically connected to the gate driving circuit and respectively configured to transmit a plurality of clock signals, and the plurality of clock signals being configured for the gate driving circuit to generate the plurality of gate signals.

7 . The display device according to claim 6 , wherein an amplitude of each of the clock signals alternates between a first potential and a second potential within one frame, current signals corresponding to currents in the clock signal lines comprise first sub-current signals corresponding to the first potential and second sub-current signals corresponding to the second potential; and

the driving circuit board is configured to determine whether the current in the signal line is greater than the preset current during one frame by determining whether one of an absolute value of a potential of at least one of the first sub-current signals when stable, an absolute value of a potential of at least one of the second sub-current signals when stable, and a combination of the absolute value of the potential of at least one of the first sub-current signals when stable and the absolute value of a potential of at least one of the second sub-current signals when stable is greater than the preset current.

8 . The display device according to claim 1 , wherein the signal line comprises power signal lines, the driving circuit board is at least configured to perform the overcurrent protection on the display panel when a current in at least one of the power signal lines is greater than the preset current during at least two consecutive frames; and

wherein the display panel comprises:

a plurality of subpixels;

a plurality of pixel circuits each electrically connected to a corresponding one of the subpixels;

a gate driving circuit electrically connected to the plurality of pixel circuits; and

a plurality of the power signal lines electrically connected to the gate driving circuit and at least one of the plurality of pixel circuits.

9 . A driving method of a display device having different working modes for executing different overcurrent protection operation processes comprising a first working mode applicable to a test of an electrostatic discharge capability of the display device, comprising:

acquiring, by a driving circuit board, a current in a signal line of a display panel;

in the first working mode, determining, by the driving circuit board, whether the current in the signal line is greater than a preset current during at least two consecutive frames;

and determining whether the current in the signal line is greater than the preset current in one frame by determining whether an absolute value of the current in the signal line is greater than the preset current in two periods spaced apart within the frame; and/or determining whether the current in the signal line is greater than the preset current in one frame by determining whether a case that the absolute value of the current of the signal line is greater than the preset current in the frame persists for at least a preset duration; and

if yes, performing, by the driving circuit board, an overcurrent protection on the display panel.